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12.32 Read Verify Sector(s) Ext (42h)
The Read Verify Sector(s) Ext verifies one or more sectors on the device. No data is transferred to the host.
The difference between the Read Sector(s) Ext command and the Read Verify Sector(s) Ext command is whether
the data is transferred to the host or not.
If an uncorrectable error occurs, the Read Verify Sector(s) Ext will be terminated at the failing sector.
Table 178 Read Verify Sector(s) Ext Command (42h)
Command Input
Field
Description
FEATURE
N/A
COUNT
The number of logical sectors to be verified. A value of 0000h
indicates that 65536 logical sectors are to be verified
LBA
LBA of first logical sector to be verified
DEVICE
Bit Description
7 Obsolete
6 Shall be set to one
5 Obsolete
4 Transport Dependent
3:0 Reserved
Command
7:0 42h
Normal Outputs
See Normal Outputs in Section 12.8 Flush Cache Ext (EAh)
Error Outputs
See Error Outputs in Section 12.24 Read Multiple Ext (29h)
248
Hard Disk Drive Specification